"Version 4 of the Internet Protocol (the layer that connects software to the
Internet) is in the process of being superseded by version 6. By default,
Ubuntu supports the new version, but many Internet service providers have not
switched over yet. When IPv6 support has not been implemented properly by an
ISP or by a broadband router, an Ubuntu user can experience slow access or even
a total lack of access to the Internet.

From reading the forums it seems that Ubuntu may have defaulted to IPv6 support

too early. IPv4 support can be re-enabled, but it involves editing
configuration files. If Canonical has decided to be ahead of the curve, it
should make it easier for people to switch back to IPv4."

This could also affect new users of openSUSE. Many users needn´t know (where
via YaST) they can enable/disable IPv6.

Have you thought, that openSUSE comes with disable IPV6 by default, till ISP
switches to the version 6?